from rest_framework.views import exception_handler as drf_exception_handler
import logging
from django.db import DatabaseError
from redis.exceptions import  RedisError
from rest_framework.response import Response
from rest_framework import status


#获取再定义文件中定义的Logger用来记录日志
logger = logging.getLogger('django')

def exception_handler(exc,context):
    """
   自定义异常处理
   :param exc: 异常
   :param context: 抛出异常的上下文
   :return: Response响应对象
   """
    # 调用drf框架原生的异常处理方法
    response = drf_exception_handler(exc,context)

    if response is None:
        view = context['view']
        if isinstance(exc,DatabaseError) or isinstance(exc,RedisError):
            #数据库异常
            logger.error('[%s]%s'%(view,exc))
            response = Response({'message':'服务器内部错误'},status=status.HTTP_507_INSUFFICIENT_STORAGE)
    return response


